Event: Combined Banks and Insurance Chess League 2006-07

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Opponent	Rating	Result
John C Inwood	0	0 - 1
Martin Lake	0	½ - ½
Michael N Jones	0	½ - ½
Nathan Pesin	0	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

-200 = (0 + 400 * (0 - 2)) / 4)